Subtracting regularly repeating sounds (Kyle Jasmin )

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Dear all,
I wonder if anyone has successfully removed the sound of a helium pump from
auditory recordings made in an MRI scanner. It occurs regularly (every 1s),
and changes over time (Praat thinks it is a formant with downward
trajectory). Any advice is appreciated on subtracting regularly repeating
sounds would be appreciated.
With thanks,
Kyle Jasmin
Speech Communication Laboratory, UCL Institute of Cognitive Neuroscience
& Laboratory of Brain and Cognition, National Institute of Mental Health
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Dear all,<div><br></div><div>I wonder if anyone has successfully removed th=
e sound of a helium pump from auditory recordings made in an MRI scanner. I=
t occurs regularly (every 1s), and changes over time (Praat thinks it is a =
formant with downward trajectory). Any advice is appreciated on subtracting=
regularly repeating sounds would be appreciated.</div>
<div><br></div><div>With thanks,</div><div><br></div><div>Kyle Jasmin</div>=
<div>Speech Communication Laboratory, UCL Institute of Cognitive Neuroscien=
ce</div><div>&amp; Laboratory of Brain and Cognition, National Institute of=
Mental Health</div>
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